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5G network
• Heterogenous
• Dense, distributed
network of base
stations
• More processing
on the edge for
lower latencies
• Small cells
• Co-existence of
multiple standards
(LTE, WiFi) and
cell types (macro,
micro, pico)
From centralized to distributed architecture
• Neat separation of control and packet processing• Architecture can be used for data offloading at edge• Useful for MEC applications
Realization of slices in the network
• Abstract network resources from underlying
physical hardware
• Control plane and user plane are separated
• User-plane functionality at network edge
• Management functionality remains at the core
• As needs change, resource allocation changes
Traditional vs virtualized RAN
Traditional
• Proprietary
• Bundled
• Configuration-specific
network technology
• Higher operational costs
Virtualized
• Computing moved to VMs in
datacenters
• Flexible, agile, cost-effective
• Only radio resources at the edge
• Operators can pool radio resources
• Radio components can be
commoditized
Traditional vs virtualized packet core (EPC / Evolved Packet Core)
• Each function is a separate box /
product
• Dedicated / proprietary hardware
• Software evolution tied to hardware
evolution (& vice-versa)
• More interoperability issues
• Higher R&D costs translating to
higher product costs
• Each function is a VM on COTS servers
• Functions are location independent
• Software and hardware evolution decoupled
• Use of COTS hardware translates to lower costs
(because of more choices / options)
Virtualized packet core – another view
• Reduce Equipment Costs
• Enable Flexible and Scalable Hardware Allocation
• Simplify System Maintenance
• Open Interface
IOT – endpoint / application aware service function chaining
• Service functions applied only to relevant traffic
• Redundancy and load balancing in the network
• Distributed service elements
• Orchestrator assisted elastic virtual deployment
OTT
• Network operator’s question – battle OTT / embrace OTT
• Ultimate objective – monetize the network better
• Possibilities
• Own OTT service
• Partner with OTT vendor to leverage subscriber base (mutually)
OTT ---- Intent based programmable networks
Datacenter
uCPE (programmable)
Network Controller
Content Provider’s
Application
Request Resources (Time, B/w)
Realtime B/w & QoS
configuration
• “Smart” applications convert user
“intent”s to network parameters
• Applications handle content requests
• Controllers handle real time requests for
bandwidth and QoS changes in network
• Network is programmable in real time
Summary
• Virtualization enables sharing of resources (network / storage / computing power)
• SDN controller realizes resource allocation in real time to users -- according to
wants, economics and policies
• Transform all areas of home and industry – entertainment, healthcare, transport,
public safety, security, warfare, government, retail, enterprise, manufacturing